Sorry, stut, it may not be perfect but that statement is nonsense.
It's an opinion which you're perfectly reasonable in disagreeing with, but I don't believe it's unreasonable. Obviously, it's based on my own requirements for the station rather than anything else.
I have a longish commute, so I just want to get on and off the train and head onwards to work as quickly and easily as possible. For me, this means quick access to/from York Way, cycle racks for platform 1 in the morning and 9 in the evening. A quick coffee or M&S stop is handy on occasion, but by no means essential.
5 years ago, there was no one-way and no gateline. I could lock up my bike on platform 1, go over the old bridge to 8 and nip across to 9 in next to no time. Now, I have to go round to Pancras Road, through the barriers, across all the platforms, to platform 1, then back to the exit gateline, find someone to let me out as my ticket won't work (and they rarely seem to be anywhere useful at the moment), go back round to the entrance concourse, fight my way across a packed waiting area under the screens that now seems to get blocked I the evening with people waiting for platforms that are still announced at the last minute, get to the 9-11 gateline and find someone to let me through, as the ticket still won't work (this usually involves waiting for all the arriving passengers first) and then being lucky if I make my train.
I could use the p9 racks, if I could ever find space, but that would involve doing to whole rigmarole in reverse in the morning, against a tide of incoming passengers on p9, where time is even more of an issue.
No, I don't expect KX to be designed to my specific requirements, but nor do I expect it to fail so miserably for anything but one particular, narrow set of requirements. The new bit is shiny (although already showing itself up as filthy - whether due to materials or lack of cleaning I don't know) but personally, as a commuter, I don't really care about a pizzeria or an expensive chocolate shop. I don't want a "retail experience", I just want to get on my train and go home.
And yet, all it would take is the tiniest compromise - one wide barrier per set turned against the flow.
So yes, for me, it was infinitely better 5 years ago.